Mechanical window lift



May 1, 1923. 1,453,845

w. KOPP MECHANICAL 'WINDOW LIFT Filed April 26. 1918. 3 Sheets-Sheet 1 aI I I lmwntoz May 1, 1923. 1,453,845

- w. KOPP MECHANI CAL WINDOW LIFT Filed April 26, 1918 3 Sheets-Sheet 2a w 14 \m a May 1, 1923. 1,453,845 w. KOPP MECHANICAL wmvow LIFT FiledApril 26', 1918 3 Sheets-Sheet 3 I I I abiOGMG J Patented May 1, 1923.

umrao stares WILLIAM Korr, or DETROIT, MICHIGAN, ASSIGNOR T0 Josnrii N.SMITI-Itt 00., "or r DETROIT, MICHIGAN, A oonroae'rron or MICHIGAN;

MECHANICAL WINDOW LIFT.

Application filediipril 26, 1918. Serial Ito- 230,366.

To all whom it may concern.

Be it known that 1, WILLIAM Kore, a citizen of the United States,residing at Detroit, county of Vayne, State of Michigan, have invented acertain new and useful 11nprovement in Mechanical WindowLifts, anddeclare the following to be a. full, cleaiyand exact description of thesame, such as will enable others skilled in the art to which it pertainsto make and use the same, reference being hadto the accompanyingdrawings, which form a part of this specification.

This invention relates to mechanicalwindow lifts and a primary object ofthe inven tion is to provide av device for raising and lowering sashrelative to a frame that may be readily and easily operated andautomatically lock the sash in position- The device is particularlyadapted for use with sashes housed between the side walls or panels ofan automobile body or door and adapted to be raised relative theretotoclose the vehicle and provide an open or closed panel in the body.Various novel features of the invention are involved inthe means forraising the sash operable from the interior of the door or body of thevehicle and adapted to raise the sash and bring the same to position toengage over the lower rail of the window opening to provide a weathertight joint. An additional feature-of the invention is involved in themeans for opcrating the window whereby the sash may be partly raised andlocked in. any desired position either fully or partially closed orfully open. These general objects and the several novel features of theinvention are hereinafter more fully described and claimed and anembodiment of the invention is shown in the accompanying drawings inwhich- Fig. 1 is an elevation showing my improved operating window liftanda part of a sash and frame therefor, the sash being partly'raised. I

Fig. 2 is a similar elevation from the opposite side,.illustrating theposition occupied by some of the parts when the sash is practicallyfully raised.

Fig. 3 is a sectional view showing the rail at the bottom of the sashopening and a sec-v tion of the lower part of the sash and operat ingmeans therefor for drawing the same to place over the cross-bar or rail.A a

Fig. 4 is an elevation showing the gears is a cross section taken online g/ -g which the sprocket chain is attached and utilized inforcingthe window up or down. Fig. 9 sa cross sectiontaken-online E-E ofF1g. 8.,

Fig. 10, is a cross section taken on line FF of Fig. 8.

Flg. 11 is an edge view of a chalnhnk pivotally connected with the'camof Sand the lug for engaging the cam.

Fig. 12 is a plan View of the link.

Fig. 13 is an elevationshowing the relationship of the chain links. 7

Fig..l 4 is a side view thereof.- The apparatus for operatingthe windowsash is mounted on a crossbar l of a window frame, the side member ofwhich is shown at 2, and it is to be understood as being grooved toreceive an edge of the sasheas shownby dotted lines at the right ofFig. 1. The ap paratus is mounted on a plate 3 secured to the cross bar1 in any approved manner,

and this plate hasrotatably mounted thereon i a combined sprocket andgea rwheel AL The gear teeth are of the usual spur gear type and thesprocket is formed by the studs. or y pins 5 equidistantly positionediinacircle on the inner face of the gear wheel. This gear and sprocketwheel 4 is driven aagear. 6 mounted on the same side of the plate aswill be understood from Fig. 5. The gear 6 is provided'with-a hub'ridingin an aperQ]; ture'provlded inthesaid plate 3 and has attached thereto aplate 7 spaced fromthe hub by the side flanges 75 andheld by means ofscrews 8. This plate 7 has a centralaper ture 9 which. aperture has apair of oppositely disposed lugs] 10 projecting thereinto for a purposehereinafter mentioned.., Bee;

tween the plate 7 and the hub of the greanfiis positioned a pair ,oflocking bars 11 and 12'. These bars are each. substantially U shaped inform and are positioned in reverse relation with the leg of one insertedbetween the legs of the other as shown particularly in Fig. 4 Each outerleg of'both the bars 11 and 12 is provided with a tooth 13, whichnormally projects into spaces 14 between a circularly arranged series oflugs 15 formed onor secured to the plate 3 as will be understood fromFig. &. A U shaped spring 16 is interposed between the outer leg of oneU and the inner leg of the other in both instances tending to move thebars outwardly with the teeth or lugs 13 engaging between the saidcircularly arranged lugs 15, and this movement forces the inner legs ofthe bars to adjacent relation although spaced apart as shown providing anarrow elongated slot centrally in alignment with the aperture 9 in theplate 7. To guide the bars in their movement the plate 7, which is to beunderstood as being removed from the face of the said bars in the Fig.4, may be provided with side flanges 7, shown in Fig. 7 and indicated bydotted lines in Fig. 4, which serve to prevent displacement of the bars.The bars 11 and 12 and plate 7 therefor are preferably provided with acover plate 19 as will be understood from Fig. 5 which may be secured tothe plate 3 in any desired manner. I

The gear 6, it will thus be understood is normally held in lockedposition by reason of the introduction of the lugs or teeth 13 on thebars 11 and 12 respectively between the lugs 15 on the plate 3preventing rotation thereof and the purpose of this will be describedhereinafter. To rotate the gear, a handle 20 is provided preferablyrotatably mounted in a plate 21 adapted to be secured to the cover plate19 holding the end 22 of the handle in position extending through acentral aperture 23 in the cover plate 19 and through the aperture 9 inthe plate 7 and between the adjacent faces of the inner legs of the Ubars 11 and 12. The end 22 of the thereof into engagement withtheopposite lugs 10 projecting into the aperture 9 on the plate 7 whichcontact enables the handle to rotate the plate carrying with it the gear6 by' reason of its connection therewith. O-n release of the handleafter desired rotation of the gear 6 the springs 16' automatically forcethe tongues or teeth" 13 between the lugs 15 and locks the gear in anyof the various possible positions and in the event that the lugs 13should engage against the face of a lug 15, slight pressure on the gear4: would tend to rotate the gear 6 until the teeth 13 were disposedopposite the opening between the lugs 15 whereupon the gear 6 would belocked thus locking the gear 4 from rotation. The gear 4 on the innerface thereof has a chain one end of which is pivotally attached at 30 tothe gear and the other end of which is pivotally attached to a block 31carried by the window sash as will be understood from Fig. 1. Each ofthese links, except the link pivoted at 30 to the gear, is provided witha notch 32 to one side of the pivot point of the links as will be seenin Fig. 13. These notches are undercut as shown and the pins 5 on thegear are preferably provided with a head to allow these notched portionsof the link to engage therebeneath as will be understood from Fig. 1.The-links are thus supported on the pins after the manner of a sprocket.The links further are provided at the said notched end with a lug 33which engages in a notch 34; on the opposite end of the attached link.By this type of joint the links may be turned on the pivots in onedirection and that is toward the notched side 32 and, when brought toalignment in the manner shown in Fig. 13 and in the lower part of Fig.1, the chain becomes sufficiently rigid at the joints to prevent furtherturning thereof, in a direction reverse to thatin which they turn aboutthe sprocket. It is to be understood that the links of the chain when inthe position shown in the lower part of Fig. 1 are not exactly instraight line as is indicated but that the lugs 33 are so positioned asto allow the joints to be turned slightly more than 180 degrees and thusare slightly to the right of a straight line from the pitch line of thegear to the point in engagement with the block. Thus, with pressureapplied by rotation of the wheel to force the sash downward the saidpressure tends to turn the links to still greater angle but, by reasonof being prevented by the lug, sufl icient rigidity is secured to causethe desired movement of the sash by operation of the gear wheel.Buckling of the chain to the left from the position in Fig. 2 is thusprevented. The lug 33 and notch 34 are so positioned to allow the linksto turn backward slightly beyond a vertical relationship wherebypressure exerted on the end of the chain tends to turn the linksbackward relative one to the other. This being limited by the lug 33,force may be applied at the end of the chain and the sash moved downwardin its frame by reason of the connection of the lower end of the chainwith the block 31 carried bv the sash. By this arangement an endless inga cam face.

' walls of the notch.

lug 1s provlded wlth an angular face 57 shown more particularly in Fig.3, and whenchain of sufiicientlength, toreach from the sash at itslowermost position to the sprocket. x

The block 31 rides in a way provided be- :tween, the lower sash bar 50and a bar 51 secured thereto. The lower end link 32 of the chain isshown in detail in Figs. 11 and 12 from which it may be seen that thelink is provided with a. trunnion 52. adapted to.

fitin an aperture 53 in the block, a, detail of which is shown in Figs.8, 9 and 10. This block is notched as indicated at 54, the notch openinginto-the central aperture as shown,

and opens through the upper edge of the block and through the left sidethereof as shown in Fig. 8 at which point one wall of the notchis'beveled as shown at 55 provid- The end link 32 adjacent the trunnion52 is provided with a lug 56.

With the trunnion 52 in place in the aperture 53 of the block 31 and thelink in vertical position as shown in Fig. 1, the lug 56 occupies theupper vertical-part 54, of the notch therein and is out of contact withthe The lower side of the the link is turned to horizontal position,whichis the position occupied thereby when the chain has been turnedabout the sprocket to bring the end link to the position shown in Fig.2, the angular face of-the lug is brought in contact with the face 55of'the block. It is to be noted that on rotation of the gear a: andwinding the chainon the j sprocket provided on the gear, the sash is fraised in. the frame by reason of the connec-- tion of the chain withthe said block 31. ,As the chain reaches its uppermost position'as shownin Fig. 2 (in which the gear and'links are shown by dotted lines inposition thereon and the block .56 in full lines relative to the camface of the block3l) the block rides longitudinally in the way providedand is thus carried by the link. to the left toythe position shown inFig. 2 to bring the end link'in horizontal position with the lug 57' inengagement with the angular face 55 of the block. hen the block hasreached the position shown in Fig. 2 the window has been raised to itsfull extent, slightly above the cross rail 90 of the windowfran'ie as'shown in Fig. 3; A continued movement,

from the position shown in Fig. 2 causes the lug 57 to engage the cam 55andthe chain.

being held in position on the-wheeltherefor forces the lug downwardagainst the cam face 55 and moves thelower end: of the sash in thedirection shown by the arrow in Fig. 3 so that the lip 60 carried by theouter face of the sash is brought overthe weather strip 61 on therail"90, thus 2 making a weather tight joint. It is to be noted that, astheblock'31is moved to the left by this final rotation of the gear thatas the pivotal placed.

point of thjejlink 32- reaches the highest point vertically. above the,center of the; gear, the

further, the sash will be moved downward.

. highest position of the sash is attained as.

shown in Fig. 3. If thegear be rotated.

inasmuch as the said pivotalpoint ofthe-v link. 32 begins to travel.downward with-the gear from this high point. .Thereforeas the, blockpasses the high point, the) end of 1 the sash is moved. first outwardver the weather strip 61 and then downward-into engagement wit-lithestrip the engagement of the lug with the cam. On reverse direction of.rotation ofthe gear and chain thereon, the first movement of the 61. byreason of sash is upward by reason of the pivotal. point of the chainand block "moving up-v i beunderstood from Fig. 1. I

The normal position of thesash50 rela-i tive toithe bar isjshowninj fulllines-in. Fig. 3-111 whichposition thesash is vertical."

The groove in the window framefor the said sash 60'is to be understoodas being of such form, however, as to allow the lower end of the sash tobe moved to the posit-ion shown;

by dotted lines in Fig. 3 with themember 60 engaging over the weatherstrip; 61', the cam arrangement above-.descrlbed be ng of a character toforce the lower endof the sash out of its normal position. On revers'ing the operation as above described toraise the sash fromengagement,withthestrip 61, the sash will naturally returnto theposition shown by full lines in when the cam members are out of contactdue to the tendency of the sash to swingfinwardto normal vertical, for,.1 I

If the sash has been moved part way through rotation of-the handle,releaseof 11'0" position in the groove the redownward by rotation of thegears shown the handle at any point will allow the teeth- 13 on the bars11 and 12 tobeextended into the notches between the teeth 15 which holdsthe gear 6,. and consequently the. gear tin mesh therewith, fromrotation. By this a r3 rangement the sash ,may be locked in anyintermediate position as may i be .desired This is ofyalue in that it isfrequently desirable to have :a window of a closed type ofautomobile'body partly open and in such; I

as not to he accidentally .dis-

rig-id. position It is preferable that a-spira lspring, 70 be providedto. act. as acounterweightfor the Y sash. This spring is shown inFigs. 1and 4 andv should preferably be positioned between the gear 4 and thesupporting plate with one end attached to the gear and the other end tothe plate. I

From the foregoing description it is evident that the device is simplein construction and veryeasily operated, and that the sash is forciblymoved either upward or downward as may be desired and is locked in anyposition and may be moved in either direction from the locking positionby rotation of the operating handle in the desired direction.

Having thus briefly described my invention what I claim is- 1. In amechanical window lift the combination with a frame and sash slidabletherein, of a sprocket, a chain connected therewith and with the sash insuch manner that rotation of the sprocket in one direction or the othercauses upward or downward movement of the sash in the frame, a gear fordriving the sprocket, a plate fixedly supported in spaced relation withthe gear and having a central aperture, a pair of springactuated lockingbars supported between the plate and the gear, means engaged by the barswhen released to action by the springs preventing rotation of the gear,and a handle device for rotating the gear, said handle device beingadapted upon turning thereof to first withdraw the locking bars fromlooking position and upon release of the handle to release the bars toreturn to locking position by action of'their springs.

2. In a mechanical window lift the combination with a frame and windowsash slidably mounted therein, said frame having a cross bar and-thesash having a bar adapted to seat over said crossbar, of a rotatableelement supported by the frame, a block secured to and slidablelongitudinally of the lower sash bar, a chain having one end connectedwith the rotatable means and the opposite end connected to the block,rotation' of the said element raising or lowering the sash in the frameby means of the chain, and means carried by the chain and engaging theblock adapted to force the sash laterally when in the uppermost positionover the said cross bar and thence downward into weather tightengagement therewith.

3. In a mechanical window lift, the combination with a frame and sashslidable therein, said frame having a cross bar, of a block carried atthe lower edge of the sash and movable longitudinally thereof, asprocket rotatably supported by the frame, a chain having one endpivotally attached to the sprocket and the other end pivotally connectedwith the block said block having a cam face, the end of the chainconnected with the block beingprovided with a lug adapted to engage thesaid cam 'face when in horizontal relation withthe block and to withdrawfrom engagement with the cam face when in vertical relation with theblock, means for rotating the sprocket to raise or lower the sash, thelinks of the chain being pivotally connected to turn in one direction.and to a limited extent in the opposite direction whereby force appliedto the links when free from. the sprocket forces the sash downward, anupwardly projecting strip carried by the lower cross bar of the windowopening, and a complemental strip carried by the lower bar of the sashadapted to engage over the strip on the cross bar, the engagement of thelink with the cam face of the block when the sash is raised to itsuppermost position forcing the sash laterally over the cross barandcontinued movement of the sprocket and consequent movement of the blockin its way drawing the window downward with the complemental strip en'-gaging over the projecting strip on the cross bar, i

4. In a mechanical window lift, a sprocket, a chain connected therewithand to the sash in such manner that rotation of the sprocket in onedirection raises the sash and in the opposite direction lowers the sash,a gear for driving the said sprocket, a plate apertured to support thegear, a plate fixedly supported in spaced relation with the gear andhaving a central aperture, lugs projecting inwardly from opposite sidesof the aperture toward the center thereof, a pair of locking barssupported in position between the plate and the gear, said bars eachhaving terminal lugs or teeth, the supporting plate for the gear beingprovided with circumferentially positioned spaced lugs between which theteeth of the bars are adapted to engage, an operating device for thesaid gear having means thereon extending through the aperture of thesaid plate and between the locking bars, the arrangement being such thaton operation of the said operating device the teeth ofthe bars are firstwithdrawn from between the lugs of the plate whereupon the internallyprojecting lugs of the central aperture are en aged by said means andthe gear rotated, springs adapted to force thebars to locking position,the release of the. said operating means allowing the springs to forcethe teeth of the bars into engagementbetween the lugs. 1

5. In a mechanical window lift in combination with a f nine and windowsash slidable therein, of a sprocket rotatably mounted on the frame, ablock at the-lower end of the sash mounted to slide parallel with theplane of the sash, a chain having one end attached to the sprocket andthe other end pivotally connected with the block, the links of the chainbeing pivoted together in a manner to allow the turning thereof aboutthe sprocket and further being provided with means limiting the relativeturning of the chain may act as a bar to force the sash downward onrotation of the sprocket said block having a cam face and the linkpivotally' connected with the said block having a lug adapted to engagethe cam face as the link is turned on its pivot, said block,

vcam and lug as the end link rides over the sprocket at the completionof the upward movement of the sash, cooperating to first force the sashoutward and then downward,

a cross bar for the frame and a corresponding bar on the sash adapted toengage over I the cross bar of the'frame when forced outwardand-downward.

In testimony whereof, I sign this specification. 1 i

WILLIAM KOPP.

